Elevator-operating system.



'E; L. DUNN. ELEVATOR OPERATING SYSTEM. APPLICATION FILED JULY 2, 1906.

987,673. Patented Mar.21,1911

11 sHEETs-sHET 1.

CALL 'E. L. DUNN.

ELEVATOR OPERATING SYSTEM.

APPLICATION FILED JULY 2, 1906.

Patented Mar. 21, 1911.

11 BHEETS-SHEET 2.

lwde miila;

IE. I pwvom 9 flttac zre 5 E. L. DUNN. I ELEVATOR OPERATING SYSTEM. I A-PYLIOATION FILED JULY 2, 1906. 987,673, I Patented Mar. 21, 1911.

ll SHBETS-SHBET 3 @Ok @mmmx E E. L. DUNN.

ELEVATOR OPERATING SYSTEM. uruouxon rum) JULY 2, 1906 Patented Mar. 21, 1911.

11 sums-sum 4.

=.E.'L.DUNN. ELEVATOR OPERATING SYSTEM.

APPLIOATION FILED JULY 2, 1906. I 9875673. Patented Mar. 21, 1911.

11 SHEETS-SHEET 5 llll I JAZZ 1291171? E. L. DUNN. ELEVATOR OPERATING SYSTEM.

APPLICATION FILED JUL-Y 2, 1906 Patented Mar. 21 1911.

11 SHEBTS-SHEBT a.

Wesses E. L. DUNN. ELEVATOR OPERATING SYSTEM.

Patented Mar.- 21, 1911. v

11 SHEETSBHEET 7- APPLIQATION PIL'ED JULY 2, 1906.

Daron? 9 area '(11714esq5es CE 72 MW.-

L. DUNN. v ELEVATOR OPERATING SYSTEM.

APPLIOATIONTILED JULY 2, 1906.

Patented Mar. 21, 191 1.

11 SHEETSSHEET 8.

./ P MHIIII WEI-5%es5es:

E. L. DUNN. ELEVATOR OPERATING SYSTEM. APPLICATION FILED JULY 2, was.

Patented Mar.21,l911.

11 SHEETSSHEBT 9.

"aid/4655625:

1.. Wary/71p 6? an: 4 m x E. L. DUN N;

ELEVATOR OPERATING SYMBH.

APPLIUATION FILED JULY 2, 1906. 987,673.

Patented Mar. 21, 1911.

' u 8EEET88HEET 1o.

wufrgsses E. L. DUNN. ELEVATOR OPERATING SYSTEM.

APPLIO'ATION FILED JULY 2, 1806.

Patented Mar. 21, 1911.

11 SHEETS-SHEET ll.

"Tame-ages;

UNITED srA Es PATENT OFFICE.

EDWARD L. noun, or wononsrnn, mnssnonnsnrrs.

mnva'ronsornnarrme SYSTEM.

Specification of Letters Patent. Patented Mar, 21, 1911, Application filed July 2, 1908. Serial No. 324,384.

sary-motions to the car; to provide ample safety devices to prevent thecar from running to provide means for preventing the operation of the car when. any of the doors of the well are open; to provide a floor indicator having a traveling pointer or the like, representin the car, and show: ing at all times the position of the car, said indicator having means for automatically stopping the car when it reaches its prede tcrmined destination, and also when it reaches the top or bottom of the well. F urther to provide an automatic mechanical or solenoid brake applicable in an efficient manner when the car is to he stopped; to provide a signal lamp or the like: to show clearly whether the car is in motion or not, and also to show when anything about the apparatus is out of order, so as to prevent the operation 01 the car; to provide a simple controlling device adapted to be located in position convenient to the floor indicator,

and having ample safety arrangements; to

provide an improved main switch, improved direction solenoid switches, and an improved rheostat; and especially to so construct and combine all these and other codperating features as to effect a great economy in space over the one point electric control elevators and dumb waiters heretofore constructed;

and also to secure these results in such a' manner that the duty of the machine can be increased without unduly increaslng the size operating parts and controlling mechther objects and advantages of the invention will appear in the course of the sub joined description.

Reference is to be had to the accompany ing drawings which illustrate a preferred embodiment of my invention, and in which Figure 1 is an elevation showing a portion of the well with car-operating mechanism and controlling box. Fig. 2 is :1 diagi'am'matic view illustrating a form Qfmotor winding and rheostat connected with the motor. Fig. 3 is a diagrammatic view showing wiring. Fig. l is a lan of the controlling devices situated at t e motor. Fig.

5 is a side View of .the main switch and brake. Fig. 6 is a bottom plan View of certain con-tactdevices connected with the main switch. Fig. 7 is a side elevation of one ofthe direction solenoid switches. Fig. 8 is a planof the indicator on an enlarged scale, parts appearing in section. Fig. 9 is a sectional view of the same on the line 9 9 of Fig. 8. Fig. 10 is a plan of the rheostat. Fig. ll is a side elevation of the same, parts appearing in section. Fig. 12 is a front e1evation of the operating or controlling box with parts broken away to show interior construction, an annunciator box, and signal lamp alm being shown Fig. 13 is a side elevation of the same, parts being broken away and shown in section. Fig. 14 is .afragmentary front elevation with parts in section on an enlarged scale showing portions of the same. Fig. 15 is-a central sectional View on an enlarged scale of parts in the op erating box. Fig. 16 is a perspective view of a friction disk employed in the operating box. Fig.1? is aperspective' view of a lug on the operating shaft. Fig. 18 is a perspeeti-ve view of a bell crank shown in Fig.

15, and Fig. 19 is a side'elevation of a portion of the car and a doonlockingdevice. mechanism. onthe car for operating the doorlocking-device also being shown.

The general nature of the invention will *first be described with special reference to Fig. 1.

The system comprises, as usual, a hoisting machine A, an operating box B, which may be located apart from the machine in any convenient position, and also controlling mechanism connected with the machine. The hoisting machine or winding mechanism-may be of the well-known worm-gear type. Attached to it, or otherwise convenient-ly located is a slate a on which are arranged switches and other devices for controlling the motor connected with the winding mechanism. This slate is preferably;

mounted in horizontal position above the operating mechanism, a door locking device for each door, and means on the car for unlocking the door at which the car is to stop, leaving all other doors which it passes locked at alltimes. An ordinary annunciating system is also provided embodying a box in the basement or any convenient place by means of which a person at the floor at which the car is to stop will indicate to the operator of the system the floor to which the car is tobe sent. Of course, at each floor there is a push button which is pressed when the car is wanted and which shows by the annunciator where the car is to be sent.

The duty of the main switch is to hold its own solenoid in circuit; to run the motor in either direction; to release the brake with which the motor is provided; to cause the signal light to burn at full candle power; to energize the rheostat solenoid; to shunt the direction-switch solenoids out of circuit; to feed a lock solenoid under certain conditions, and energize a car solenoid, which will be described below. All of these duties with the exception of controlling the motor and releasin the brake are performed by auxiliary switches located below the main switch solenoids. The duty of the direction solenoid switches is to energize the main switch solenoids, provided the well-room doors are all closed, and if not, to remain in circuit until the doors are all closed, and, at

the same time, feed the lock solenoid so as to prevent the pointer of the operating box from being reversed. The duty of the rheostat is to protect the motor from a rush of current, and in starting, to accelerate the same until full s eed is reached, those being the ordinary duties of such a rheostat. The duty of the floor indicator is to rotate or otherwise move a pointer when the car moves, the rotation of the pointer being proportionate to the travel of the car, and indicating at all times the position thereof; also to make a contact or close a switch as the car passes each floor, and if the operating box pointer has been placed in position oposite the numeral indicating any particuar floor, to stop the car at that floor.

The operating box B which has been mentioned, is placed in position convenient to the annunciating box and to the signal li ht. This box contains in addition to these earesent instance, I tures, a lock actuated by a solenoid, fed first 8r controlled by I later by the main-switch, two small direction by the direction of switch solenoids, and

switches, a contact for each floor, and a movable pointer.

To start the machine, the pointer is moved to the contact representing the floor to which the car is to run. Mechanism is provided for preventing the car from starting until the pointer has moved at least one space onto a point indicating the next floor. When the pointer is moved this distance, five dis- .tinct operations take place in the operation box. First, the circuit which causes the machine to stop is opened; second, a new stop circuit is closed or made; third, the direction switch closes; fourth, the lock solenoid lifts its plunger to prevent the pointer from being reversed; and fifth, the direction switch opens. To describe these operations more specifically, it may be stated that when the pointer is moved onto a contact indicating another floor than the floor at which the car is then stopped, the direction switch in the operating box is closed, and the corresponding direction solenoid switch mentioned above as being part of the controlling mechanism at the machine, operates. The small solenoid in the operating box, called the lock-solenoid, also operates to prevent the pointer from being reversed, and, at the same time, to open the direction switch which has just been closed. Now, provided all the doors in the well are closed, the main switch operates, the machine starts, and the lamp burns at full candle power. 011 the other hand, if a door is open, the lamp remains extinguished, and the direction solenoid switch at the machine and the lock solenoid remain in circuit, thus locking the pointer against a reverse movement. If the door is now closed, the machine will start, the direction solenoid switch is then energized and the lock solenoid remains in circuit until the machine stops. This is indicated by the signal lamp changing from full candle power to half candle power. The car is forced to follow the pointer of the operating box. If the pointer is once moved a floor space, it can be carried ontothe limit of its travel, but it cannot be moved in the opposite direction until the machine has sent the car to the floor indicated by the pointer. If the current is broken by the forcing open of a door while the car is in motion, the car is instantly and automatically caused to stop. In such a case the car is not at thefloor indicated by the pointer, and if the pointer is then moved one floor space in a direction opposite to that along which it was moved to send the car in the direction in which the latter had been moving, the car would go to the limit in that direction where it would be stopped naturally by the automatic which is provided. A second seams movement of the pointer in the saime'direo automatic being "open. The first movement 1n the other direction starts the car, and the car will thenstop correctly with the pointer again: v

The general scheme of operation Willnow described with special reference to the diagrammatic representation of. the wiring in Flgs. 2 and 3. C The mains are designated v y the plus and minus signs rind-'- are con-- nectedby a switch with-the sev eral-wires for operating the different devicesemployed.

Referring first to Fig. 3, it will observed that the plus main is connected with two conductors, to a down'uutomaticor limit stop'i Mund an up ,autqmatic or limit stop A .Ezich of these automatics is a part of cator and is intended to break the circuit when the indicator shows one is in constant communication by means of a conductor with a direction switch in the operating box B, the two direction switches being designated by'"B and B At this point, under normal conditions, the current is broken, and, therefore, the wires lending to the'direction switches are dead, Inlilr'e manner, the two automatics are constantly connected by conductors with a. pair of movable terminals which area part of the two direction solenoid switches spectiyelyi These switches are on the'slste, and in their normal condition, the terminals are out of contactwith their conductors, and consequently, the current is normally broken at this point.

By reference to Fig.7, it will be seen that each of the switches O and C comprises a solenoid. 0 having a core c which carries a horizontal bar 0, and which'carries a pair of conductors c and c electrically c nected together. When the solenoid .is not supplied with current, the hair is down and the terminals 0 and c are out of corn tzict with e. pair of terminals c and a", hut 'when the current is supplied to the solenoid,

and the bar is thereby raised,the terminals 0 and c are brought-into contact with the latter. Therefore, as the secondconductor leading from either of the automatics A or y A is permanently connectedwith the-ten minals c and c of one/of the switchesC or C the excitation of the corresponding solenoid 0i puts the automatic into communication with both of the terminals "c and c of the corresponding switches. The terminals c on the "two direction solenoidswitches arein communication with the cor-. responding solenoid to .feed current thereto,

and also with a pair of terminals b and 5* on the direction switches Ben'd 3 respec tively. .The' 'purpose of these will 'b'e ex;

switch in ,one of which supplies current.

the floor indiw that the car is either atthe top or bottom ofthe well. Each C and C ro ergized, tigi'rongh the fuse D" 'nmdl], and theresistnnce l main switch sol terminals the automstics A or A the to" The two terminals c are connected t which is in'-'-communicstion in series with the lock solenoid E. This solenoid is in communication w th 'a resistance F through which the current passes to the negative side of the line. It will be seen, therefore, that when either of the switches C or U- is energized,

current will be transmitted from one side of the line through the corresponding outoins-tic A or A to the solenoid which is enthe lock soleto the other side of the line. The way in which this state of aifsirsis hroughtsbont will be described belonn. v

,1 'llqhe terminals o on the direction solenoid switches are in constant communication with two-main switchsolenoids G and G which control the operation ofthe car. These solenoids are connected at their other terminahin parallel with each other and in series, with s fuse Ill- This fuse has 21 coir doctor passing through a series of door switches H", H H H and H arranged in series and then communicates with the condoctor leading to the negative side of the ins between the loci; solenoid and the resistance F, Therefore, the operation of either of the switches C and G will supply current to one of the solenoids G and G provided the door switches are all closed. These door switches, as will he explained-helow, are so arranged that when the doors in toe elevator well ere closed, switches will be closed and the opening of one the doors will open the switch and consequently cut out the main switch solenoid wl ich is at that time in operation, end-prevent eitherof these solenoids from being again con nected until ell the doors closed.

After one of the direction solenoids is on created it is automatically out out or short,- circuited, in manner to he described below, and in order to lreep the main switch solenoids in ope =n "er the dir tion. sole noids are cute inside-ted te'.

each connected it. current to the on noid COIISBQHGFZ? noid Gis energ other solenoid will g in each case is co tor feedini? from or A to the opposite tori in t c current is'heing supnlie u i opposite onto. I i

the oppositefmsin switch solenon sndthe smne is true of the two The terminals are 121 constsn have stems g whica support contact plates g these plates being insulated from the 4; 987,673 with the conductor which connects the two connected by one of the plates 9 with one solenoids C and G with the fuse-D of the terminals g, and consequently, the

5, it will be seen that and G are as usual cores, and that these By reference to Fig. the two solenoids G provided with movable current is free to pass through the lamp, and it will burn at full candle power unless one of the door switches should be opened.

It has been seen that the passage of the current through one of the automatics A or A connects one of the direction switches B or B with the source of power, but that the connection is broken on account of these switches not being in contact with the terminals b or b. I have provided means, which will be described below, for making one of these contacts when the operating handle is moved to send the car either up or down. If the car is to be sent up, one of these terminals is connected to the corresponding 1 switch, and if it is to go down the other one is connected. In one case the current is then l l stems. Now when a core is raised as is shown at the right of the above mentioned k figure, the stem and plate will be raised, with it and the plate brought into electrical connection with each of the terminals on that solenoid. This, of course, puts all of these four terminals into electrical connection with each other, and any current leading to any one of them is free to pass to any of the others, and to any point with which any of them are in electrical communication. Therefore, when one of these plates is brought into contact with the four terminals, as described, the current is free to travel from the opposite automatic to the terminal 9", then across to the terminal and from there to the fuse D, from which it takes a course through the lock solenoid E, and the direction solenoid is short-circuited and cut out. This does not aflect the passage of the current through the main switch solenoid, however, as the terminal which is in communication with the other terminals, is in connection, as has been stated, with the conductor leading to the opposite main switch solenoid, and, therefore, that is fed with current in the same way as it would have been if the direction solenoid had remained active, but the current is fed through a different path including the terminal g. The signal lamp I is employed to indicate to the operator the condition of the elevator. It is convenient to have this lamp at full candle power when the car is in motion, and at half candle power when the ear is stopped, provided the lineis in condition to have it started, and to have it extinguished when the line is broken, as by the opening of a door, and the opening of one of the switches H, etc. In order to accomplish this, the plus main is connected through a signal lamp resistance i in series with the signal lamp. The opposite side of the lamp is connected with the fuse D which, as has been stated, is connected with the negative line through the door switches and the series resistance F. \Vhen the current passes in this way through the lamp, the lamp will burn at half candle power on account of the resistance in series with it, and if one of the door switches is opened, the current will, of course, be I stopped and the lamp extinguished. In order to cause the lamp to burn at full candle power when the ear is in motion, means are provided for shunting out the resistance 2' free to pass from the positive main through the down automatic A to the switch B, the terminal 12 and then directly to the direction solenoid C. In the other case the current can pass in a corresponding manner through the up automatic A to the direction solenoid C which sends the car up.

In order to supply current to the floor indicator K, the positive main is connected through a pair of well-room limit stops L and L with a pair of carbon terminals 9 and on the main switch, one being adapted for operating when the ear is to go up, and the other when the car is to go down. Both of these terminals when they are brought down into contact with the corresponding terminals g and are thus brought into communication with a binding post M, These connections are represented in Fig. Referring again to Fig. 3, it will be seen that this binding post is in constant communication with the fuse D This fuse in turn communicates with a contact ring on the, indicator. Pivoted within this contact ring isan indicating arm 70 having a contact with the contact ring, and provided with a pointer k always in electrical connection with the contact ring. Located at equal distances from the. center of the ring and the pivotal point of the pointer are a series of terminals representing the several floors. As shown in this figure there are five of these lettered n n n, a and a, the last two being at the ends of the series. The terminals (4 and o are mounted on pivoted arms connected with the automatics A and A A spring is provided for holding the l two terminals of each automatic in contact, and when the indicating arm moves around into a position to carry the pointer to engage either of the termmals a or a the corresponding arm is swung on its pivot and the conductor is broken at this point to open This consists in a connection from the terthe circuit. When the pointer is in contact minal s directly to the lamp I. \Vhen the with one of the terminals W, n or 'n, howcar is in motion one of the terminals g is ever, connection is made through the conare plates and 0 not in electrical conneo' ductors described from the binding post M,

and, therefore, from the positive mainresponding to the number of floors, it being understood that at the two ends of the series tion with any part ofthe conducting system. These plates are mounted in an are or circle so that a pivoted pointer may be passed 'over them. This pointer is provided with a pair of spring-pressed contacts, one of them being adapted to engage the terminals 0., 0 etc., in its passage over them, and the other to engage a contact segment o This segment is connectedwith the negative main at a point between the look solenoid and the resistance F. Therefore, it will be seen that when this pointer is in communication with any one of the terminals, except the two end ones, the current will be sent through the connections described above, as soon as the indicating pointer comes into contact with the corresponding terminal on the indicator. This circuit is designed to short circuit the main switch solenoids and stop the car, and as the indicating pointer 70 moves with the car the latter will be stopped at the desired floor. At the ends of the travel of the car, it is stopped in a different way by the automatics A and A and also the well-room limit stops L and L The conductor which connects the fuse D with the ring isis also connected with the rheostat solenoid P. This is designed to operate connections for gradually throwing out resistance when starting the motor and to protect it from a sudden rush of current. Referring to Fig. 2, it will he se, a that the motor is provided with series and shunt windings, and that the binding post'M is;

connected on one side with both. The bind- .ing post is also connected with a terminal sistance g is connected with a binding 0st 1'. The binding post 1" is in series witi a movable contact blade g forming part of the main switch, and adapted to feed the motor as'will be seen by the diagrammatic connections of Fig. 2- The blade 9' moves alternately to two contacts which feed the armature of the motor in opposite directions.

In electrical connection with the bindingpost r is a pivoted arm p on which are a plurality of contacts 72 all in electrical connection with the binding-post 1'. When the arm p is raised current willfpass from the binding post through the series winding through the resistances g, g g g to r and then to blade 5/ It is to be noted that the contacts p 39 79 p, p and g) are arranged in a step by step relation, each one being slightly raised by aspring above the one at. the left, consequently, when the arm p is lowered, one of the contacts 79 comes in contact with the terminal 19 After this the cu-rrent passes to the binding-post M through the entire series winding to a binding post connected with the terminal 12 and from there through the resistances g, g and g to the bindin st 1' and then around to the Mina-' ture. As the resistance is now cut out or shortcircuited, there is less resistance in the line. 1 As the terminals p are lowered,v the other terminals p, p" and p in their order are brought into electrical communication with the binding-post r, and the resistances g and 9 cut out by shortcircuiting. Vvhenthe carbons p are lowered another step, the terminal p is brought into connection with the. binding post r, and onehalf of the series winding is short circuited. lVhen the terminal 72 is brought into connection with the binding post 1', the entire series winding is short circuited and the motor is then run on the shunt alone. Vv hen the arm 7)? is raised, of course, the opposite action takes place and the motor is started by use of the rheostat in a manner which will be readily understood. In connection with this diagram, it is to be noted that the armature is connected with another pair of terminals, and that a movable blade 9 similar to vibrates between them. The carbon terminals 7 g and 9 are duplicated on the other side, a binding post M takingthe place of the binding post M, but this one is not connected with the connections shown in Fig. 3. One other connection is shown on Fig. 3 which comprises a conductor between the switch D and the car solenoid S. This solenoid is connected on the other side with the negative main, and

consequently, at all times when the binding These features which have not tains, as has been stated, the main switch G, the direction solenoid switches C and C the floor indicator K, the rheost-at P, the fuse D. 1) and l), the line switch, and the main fuses. The direction solenoid switches have been described in full. The main switch has also been described, and the way in which it operates the brake on the motor will now be taken up. Fig. shows this switch as provided with a rod 5 upon which are two cars having slots g The vibrating arms ol the switch have studs g" operating in said slots and moving the rod under certain conditions. The length of. the rod is adjustable in an obvious manner. At a certain point. on the rodit is provided wit-h a toggle-joint y, the two ends of the toggle operating a pair of arms g which operate brake-shoes These brake-shoes are piv+ otally mounted below the brake-wheel and may be lined with leather or otherimatcrial to provide for an efiicient operation. The arms y are normally forced together by a strong spring so that when the switch operates in such a manner as to permit the inner ends of thetoggle arms to descend, the spring will operate to apply the brake. The position of the. vibrating portion of the switch determines the condition of the brakes as will readily be understood. V

The floor indicator, as shown in Figs. 4, 8 and 9 is provided with any desired-number of contacts, such as those represented by the characters a a and n in Fig. 3. In the other three figures mentioned, this indicator is shown as provided with a large number of contacts to enable the elevator to operatein a building with a corresponding number of floors. These contacts are connected in the same manner as those represented in Fig. 3, and in fact, they represent the same thing.

As has been stated, the chain'o' operates the floor indicator. This is done in the present instance, through a worm-wheel and worm connected with "a shaftfc On this shaft is mounted a head 7:? which isconveniently supported by adisk on the bearing for the shaft and which carries a ring In. Under this ring is the. stationary contact ring 7.2, and the ring is carriesa pin it; con-v stantly in contact with the ring The connections of the ring is have been described above, and are shown in Fig. 3. This figure also shows the connections of the contacts or, 92. it, etc. Each of these contacts is preferably provided with a roller, these rollers being set in the arc of a circle. The ring Zr carries a projection 70 which has a perforation through which passes a'r'od is". On this rod is a spring k for normally holding it in an extended po ition, and on its outer end it carries a contact la. This contact which is normally arranged in a position to be engaged by the rollers, is rovided with slanting surfaces from its center so that the rollers may be adjusted on their support in such a manneras to regulate the length of time during which they will be in contact with this member. The supports for these rollers are intended'to be adjusted along the circular ring a on which they are mounted so as to make the car stopping circuit at exactly the right 'tillle tO stop the car at the floor in each case. The length of time during which that contact is kept closed is controlled by the position of the rollers, or the distance of the roller from the center of the circle. This point. will, of course, be regulated by the weight of the car and other mechanical considerations'of a like nature.

his to be observed that the projection L1 is provided with a socket for the part; k and on each side of the socket is an arm is projecting in a slanting direction. These arms are designed for the purpose of engaging the contact rollers on the up and down 'automatics A and A and for permitting them to pass the automatics under extraordinary conditions.

The rheostat shown in Figs. 10 and'll has previously been described in connection with the diagrammatic illustration of Fig. 2. The solenoid P which operates it is connected in the manner shown in Fig. 3, and operates a plunger that is pulled away from the magnet by a spring 12 this plunger operatln the arm p in an obvious manner, and das -pots 1) being provided for the usual pur ose.

The opcratin x B has been referred to several times. t has been stated that this operating box includes a lock solenoid E, anda pair of directing switches B and B which are adapted to engage terminals 1) and b. The contacts 0, 0, 0 etc, have been mentioned, and the wiring has been described. It will be remembered that the contacts in this box, with the exception of the two at the ends, are connected with corresponding cont-acts which consist of rollers in the floor indicator shown in Fig. 8, the number of contacts in each case being the same, and the end contacts not being conneoted together on account of the operation of the automatics A and A This opere ating box is designed for the purpose of controlling the system. A handle or knob b is the only part of the mechanism which projects through the cover plate, and consequently the entire operation on the part of the operator is performed through this hand-wheel. The cover-plate is intended to be opaque, and to conceal "the parts within with the except-ion of a row of numbers indicating the floors and a pointer passing over these numbers. Thls pointer is controlled directly by the knob, and it is carried by an arm I), preferably of insulating material. This arm is provided with a pair of spring-pressed contacts b", one of which constantly engages the conducting ring 5' -which has been referred to in the descripa careers tion of Fig. 3. The other contact moves along in the path of the contacts 0 0 etc, and engages them in rotation. Consequently, as the two contacts Z; are in con stant electrical communication with each other, the connection between the strip 5 and the contact over which the arm rests will be made to produce the effects which have been previously described.

In order to operate'the arm 6 from the knob 6 the latter is provided with a collar motion switch should be it may be in proper terminals 5 and 5 having a projectionb. This collar is mounted rigidly on the shaft which carries the wheel, and this is the only part which is rigid at all times with. the hand-wheel. The arm 6 is mounted in a frame 6 which is capable of rotation in bearings provided 'Within the box. It will not rotate upon the turning of the hand-wheel 6, however, unless the projection b is in engagement with the arm 6 as shown in Fi 14. When this is the case, the arm arid pointer will go with the hand-wheel, otherwise the handwheel may be turned without causing any motion of the pointer.

-The direction switches are so connected with the direction solenoids as to determine the direction in which the car shall move. Consequently, it is desirable that when the pointer is moved sufficiently to cause the car to move to any floor, the corresponding dioperated thereby, and that the switch should be opened immediately after the car starts in order that condition to start the car in the same direction or to return it. It will 'be remembered that the solenoid direction switches C and C are also thrown out of connection innnediately after they have performed their duties. To secure this result, iii-this case a clutch is provided, comprising :1 friction surface on the frame and a fr ction plate [2 mounted to turn on the same axis, and provided with. a friction plate" engaging said friction surface. This friction plate has a lug" l) which is adapted to engage either of the switch ar ns B or B and move them into mgagen'ient with the :1 spring 71 Now if no pressure is ap led to the baclt of'the plate Z), the movement of the frame h will not result in imparting motion of the former. in order to apply friction at this point, and in fact to concentrate all the friction here, a. plate Z2 is provided which is movable along a hub on the frame Z). This plate has'roller bear ings between it, and the back of the plate W- and a bell-crhnlr 6, shown in Fig. 18; is provided for forcing the plate against the friction plate. This bell-crank has a connection with a rcciprocable locking stud c" connected with the lock solenoid. This stud I will h against the resistance is provided with a head for engaging the bell-crank and forcing the plate 6 toward the friction plate, and when the parts are inposition shown in Fig. 15, the friction plate will move with the frame 5 and performs its ordinary function.

The stud e is normaly held down in the positionindicated in Fig. 14 by means of a spring 6?, and it is connected with a core 6 in the solenoid which upon the excitation of the latter, will move the stud upwardly into position to relieve the tension of the spring, and thus allow the bell-crank'to turn and t-heplat-e b to-move backward a slight distance so as to'relieve the frame 6 of the friction. out causing the friction plate to turn, and without moving't-he direction switches. Another function which the stud possesses and which gives the name to this partjof the mechanism is that the head in normal position is out of the path of the projection I), but when projected u wardly by the solenoid, is in the path 0 this projection, and

Jrev-ent its passing beyond it. Conseqnent y, when the pointer is placed in any certain position and the solenoid is actuated, the handwheel can be turned in the opposite direction far enough to bring the projection Z)- into contact with the other side of the arm Z the pointer cannot be moved in the opposite direction until the'pin has been withdrawn by the spring c In order for this to take place thecnrrcnt has to be cut off from the solenoid, as by operation of one of the automatics.

It is intendedthat the operation of the contacts on the arm 6 shall be the same throughout the system, but it is found in practice that if the arm is stopped near the end of the next to the last contact, it does not have space enough to move to. accomplish the desired result in moving onto the last contact, therefore, I have provided this arm with 'a'pafir of metallic pointed projections One of these projections is .ted to come into contact with two posts when the arm reaches the end of its in either direction, These two posts nsulated from each other, and one is other-is connected with the switch member B. @n. the other side. similar connections are made with the terminal 6 and member 15 Consequently, if the projection Z2 does not move far enough to bring the arm B or B" into contact with the terminal 6 or Z), the movement of the'ann to the limit of its stroke will perform the some function by connecting these elements through the projections F) and the posts 6 The manner in which these parts operate has been described above.

Referring now to Fig. 19, it will be seen This frame can now turn wit-h-' and therefore, this arm and connected with the terminal 72 while the.

that the car solenoid S, the connections of. which have been described before, is pro-.

vided with a plunger 8" operating a rec1procable rod 5 This rod is pivotally connected with a pair ofbell-crankssfl-whic at their opposite ends, carry a rail 8*. A spring 5 is provided'for normally forcing therail outwardly in opposition to the action of the solenoid S. Now at each door there is a lock T having a bolt 15 with which is connected a lever 25 carrying a roller t A spring I. normally forces the bolt into rollers If, but when the car stops, the solenoid S is cut out and, therefore, the spring 5 is free to force the rail 5 against the roller t at the floor at which the car stops. This swings the lever and unlocks the door so that it can beo'pened. In this figure,

also isshown, a detail of one of the contacts II. v

This comprises a pair of spring pressed pivoted contact members It connected with the line between the fuse D and the line passing to the resistance F. as shown in Fig. 3. A contact plug 71, is mounted on an insulating plate in such position that when the door closes, the ends of the two members It will engage it and-both of them make a contact with it. .When the door is opened, they are withdrawn from the plug and the contact is broken in an obvious manner.

On the car also'is'shown abox U having push buttons representing the several floors. This is a part of the-an'nunciating system which has been referred to above. At each door, also, there is a press button, not shown, also constituting a part of this annunciating system and constructed in any ordinary manner.

By referring to the first 'part of this specification, the general manner of opera tion of the system as a whole will be understood. The description of the several parts which has been given shows how these parts cooperate in order to provide the desired results.

WVhile I have shown and described a particular form in which invention may conveniently and efficiently be embodied, I

am aware that many modifications may be made therein, not only in the construction of the several features which are combined to form the system, but in the arrangement "thereof. and, therefore, in the system itself,

by any person skilled in the art withoutdeparting from the spirit of the invention as expressed in the claims.

Having thus fully described my invention, what I claim and desire to secure by Letters Patent is 1. In an elevator system, the combination of a hoisting machine, a series of doors, an operating box having a movable pointer arm, a knob or handle for moving the pointer arm, and electrical means for controlling the entire operation of the hoisting machine directly from said pointer arm, comprising connections whereby when one of said doors is openthe electrical means will be inoperative to start the hoisting machine. 2. In an elevator system, the combination of a hoisting machine, a movable pointer arm, an operating knob or handle for moving the pointer arm, movable in- .dependently of the pointer arm, means controlled by said pointer arm for starting the hoisting machine in either direction and for stopping it, an operating box inclosing said means, a series of doors, and means whereby when any one of said doors is open the hoisting machine will be rendered inoperative.

3. In an elevator system, the combination of a car, a rotatable knob or handle for controlling the destination of the car, means controlled by the. knob or handle for starting the car, positively locking the knob or handle against reverse motion after it has started to move in either direction.

4. In an elevator system, the combination of a car, a pointer arm for controlling the destination of the car, means for starting the car, means for stopping the carat the floor indicated by the pointer arm, and an electromagnetic means operating when the pointer arm is started in either direction for automatically locking the pointer arm against reverse motion.

5. In an elevator system, the combination of an operating mechanism comprising a knobor handle and means connected with said knob or handle for directly controlling the entire operation of a hoisting machine, with a floor indicator connectedwith said operating mechanism and constituting means for closing stopping circuits at the floors.

6. In an elevator system, the combination of an operating mechanism, a motor, means connected with the operating mechanism for directly controlling the operation of the motor, a series of motor stopping circuits, and a floor indicator connected with said operating mechanism and constituting means for closing the motor stopping circuits at the several floors of the elevator well.

7 "In an elevator system, the combination of an operating mechanism, a'motor controlled thereby, a floor indicator having a motor-controlling circuit. a

8. In an elevator system, the combination of a'car, operating mechanism therefor. a

controlling mechanism mechanically independent of: the operating mechanism but electrically connected therewith comprising a movable member, which by its position determines the floor at which the elevator car is to stop, with a floor indicator having a movable member, means for controlling the stopping of the car, and means for causing the last named movable member to travel proportionately to the travel of the car.

9, Inan elevatorsystem, the combination of a car, a controlling mechanism comprising a movable member, which by its position determines the floor at which the elevator car is to stop, with a floor indicator having a movable member, means for causing the last named movable. member to travel proportionately to the travel of the car, and a plurality of motor stopping circuits one being closed at one point by the first named movable member when it indicates a floor, and allbeing closed in turn at another point by the second movable member as the" car passes the several floors.

10. In an elevator system, the combination of a car, a controlling mechanism and a single means for operating said controlling mechanism, said controlling mechanism comprlsing a movable member which by its position determines the floor at which the elevator car will stop, with a floor indicator having a movable member, means for'causing the last named movable member to travel proportionately to the travel of thecar, a series of contacts representing the several floors, and means for closing a'motor stopping circuit as said last named member passes each of said series of contacts.

11. In an elevator system, the combination of a car, a controlling mechanism com prisinga series of contacts, a movable member adapted tomove over said'contact's to engage the one indicating the floor to whichthe elevator car is to move, and to: close a corresponding motor stopping circuit, with a floor indicator comprising a corresponding series of contacts, a movable member,

means for moving said member in proportion to the movement ofthe car, said member representing the car at all times and showing its position, and means connected witl the contacts of said floor indicator for clos ing a motor stopping circuit asgthe movablc member passes each contact and as.tlie ca1 passes each floor, each of said motor stop ping circuits being broken at the controlling mechanism except the one closed by the movable member thereof.

12. In an elevator system, the combination of a car, a-controlling mechanism comprising a pair of direction switches and a cone trolling handle or knob having means -for closing either of said switches in accordance with the direction of movement of the handle or knob, with a pair of direction solenoid switches connected with said switches in the controlling mechanism, and means connected with said direction solenoid switches for controlling thedirection of movement of the elevator car, and means for automatically opening said direction switches.

13. In an elevator system, the combination of a car, a controlling mechanism comprising a pair of direction switches and a controlling handle or knob having means for closing either of said switches in accordance with the direction of movement of the handle or knob, with a pair of direction solenoid switches connected with said switches inthe controlling mechanism, means connected with said direction solenoid switches for controlling the direction of movement of the elevator car.

14. In an elevator system, the combination of a car, a controlling mechanism comprising a pair of direction switches, and meansvfor closing either of said switches, with a pair of direction solenoid switches connected with saidswitches in the controlling mechanism, and means connected with said direction solenoid switches for controlling the direct1on of movement of the elevator car.

15. In an elevator system, the combination of a controlling mechanism comprising a pair of direction switches, and means for .closing either of said switches with a pair of direction solenoid switches and electric circuits connecting each of the, solenoid switches with one of said switches in the controlling mechanism.

16. In an elevator system, the combination of a controllingfmechanism comprising a pair of direction switches, a pair of direction solenoid switches electrically connected therewith and operated thereby, and a main switch having two parts for controlling the direction of motion of the elevator car, said parts each having a solenoid connected with one of the direction switch solenoids.

17. In an elevator system, the combination of a controlling mechanisni, a main switch hsving solenoids for controlling the direc- 

